This thermocouple is a very simple and effective way to demonstrate the production of thermoelectric E.M.F..
When two wires of different metals joined at one end the other end is cool, electric charge flows through them.

Unit conversion cards are used to aid students in learning different units of mass, time, length, energy, force, area, volume, temperature; as well as converting them among different systems. Comes with a 12 page instructions.

This classic device is used to demonstrate the conservation of mechanical energy. When the wheel is rotated by hand to the top and released, its potential energy turns into kinetic energy (rotation) as it falls. After the wheel reaches its bottom position, the kinetic energy changes back to potential energy when it moves up again. This process continues until the total energy is lost because of friction.